Dynamic spatial allocation of satellite capacity based on mobile vessel load forecasting

ABSTRACT

Methods, systems, and devices are described for providing dynamic spatial allocation of satellite capacity based on aircraft load forecasting. In embodiments, a satellite communications system provides network access service over a service area via a plurality of satellite user beams, predicts spatial network resource demand for the service area over one or more service periods based at least in part on forecasted travel paths of a plurality of mobile multi-user terminals over the one or more service periods and respective predicted service demands for the plurality of mobile multi-user terminals, determines a satellite capacity resource configuration for the plurality of satellite user beams for the one or more service periods based on the predicted spatial network resource demand, and then adapts at least one characteristic of the plurality of satellite user beams for the one or more service periods based on the determined satellite capacity resource configuration.

CROSS REFERENCE

The present application for patent is a continuation of U.S. patentapplication Ser. No. 15/433,876 by Peponides, entitled “DYNAMIC SPATIALALLOCATION OF SATELLITE CAPACITY BASED ON MOBILE VESSEL LOADFORECASTING,” filed Feb. 15, 2017, assigned to the assignee hereof, andexpressly incorporated herein.

BACKGROUND

The present disclosure relates to wireless communications in general,and in particular, to allocation of satellite capacity involving mobilevessel communications.

SUMMARY

Methods, systems, and devices for dynamically allocating satellitecapacity based on mobile vessel load forecasting are described. In someexamples, a multi-beam satellite system may provide network accessservice to passengers on mobile vessels (e.g., aircraft, ships, trains,etc.) within a service area via a plurality of satellite user beams. Forexample, multi-user access terminals on the mobile vessels may enablepassengers to access the Internet (or other network) via a two-waycommunication link with a multi-beam satellite. Due to the large numberof passengers on a particular mobile vessel, the network resourcedemands for the mobile vessel may be significant. In addition, given themobile nature and the high rate of speed, the network resource demandswithin a particular geographic area may vary significantly over arelatively short period of time as various mobile vessels enter andleave that particular geographic area.

A network resource manager of the satellite system may predict spatialnetwork resource demand for the service area over one or more serviceperiods. This prediction may be based on forecasted travel paths of oneor more mobile vessels and a respective predicted network demand for aplurality of mobile multi-user terminals on the one or more mobilevessels. From the predicted spatial network resource demand, the networkresource manager may determine a satellite capacity resourceconfiguration for the plurality of satellite user beams for the one ormore service periods. The network resource manager may then use thesatellite capacity resource configuration to adapt one or morecharacteristics of the plurality of satellite user beams for the one ormore service periods. These techniques may allow for the maximization ofcapacity utilization to meet network demand where it is needed in theservice area and during particular service periods.

BRIEF DESCRIPTION OF THE DRAWINGS

A further understanding of the nature and advantages of embodiments ofthe present disclosure may be realized by reference to the followingdrawings. In the appended figures, similar components or features mayhave the same reference label. Further, various components of the sametype may be distinguished by following the reference label by a dash anda second label that distinguishes among the similar components. If onlythe first reference label is used in the specification, the descriptionis applicable to any one of the similar components having the same firstreference label irrespective of the second reference label.

FIG. 1 is a simplified diagram of a satellite communications system inwhich the principles included herein may be described.

FIG. 2 is an example diagram of a service area with example routes inaccordance with various aspects of the present disclosure.

FIG. 3 is an example diagram of a satellite user beam configuration ofsatellite user beams across a geographic area, in accordance withvarious aspects of the present disclosure.

FIGS. 4A and 4B are contour diagrams of predicted spatial networkresource demand for an example future service period, in accordance withvarious aspects of the present disclosure.

FIGS. 5A and 5B are simplified diagrams illustrating an example ofre-allocating system bandwidth among satellite user beams to dynamicallyallocate satellite network resource capacity based on network loadforecasting, in accordance with various aspects of the presentdisclosure.

FIG. 6 is an example diagram of modified beamforming of satellite userbeams to dynamically allocate satellite network resource capacity basedon network load forecasting, in accordance with various aspects of thepresent disclosure.

FIG. 7 is a simplified timing diagram illustrating an example ofadapting dwell times to dynamically allocate satellite network resourcecapacity based on network load forecasting, in accordance with variousaspects of the present disclosure.

FIG. 8 is a block diagram illustrating an example of a gateway fordynamically allocating satellite network resource capacity based onnetwork load forecasting, in accordance with various aspects of thepresent disclosure.

FIG. 9 is a block diagram illustrating an example of a network resourcemanager for dynamically allocating satellite network resource capacitybased on network load forecasting, in accordance with various aspects ofthe present disclosure.

FIG. 10 is a flowchart diagram of an example method for dynamicallyallocating satellite network resource capacity based on network loadforecasting, in accordance with various aspects of the presentdisclosure.

DETAILED DESCRIPTION

Increasingly, passengers on mobile vessels desire broadband networkaccess while in transit. Mobile vessels may receive network accessservice via a communication link such as a satellite communicationslink. The mobile vessels may have an on-board multi-user access terminalthat communicates with ground stations (e.g., via a satellite) of acommunications system and provides network access connectivity for thepassengers. For example, users may connect their communication devices(e.g., smartphones, laptops, tablets, etc.) to a wireless local areanetwork (WLAN) served by the multi-user access terminal, which routesdata communications to other networks (e.g., the Internet) via thecommunication link. Thus, a capacity of the communications link may beshared by the users via the multi-user access terminal.

The satellite communications system may be a multi-beam satellite systemand the communication link may use resources of one of the satelliteuser beams at a given time. Each mobile vessel may represent a largenumber of users, all potentially accessing broadband contentconcurrently. For example, a cruise ship may have thousands ofpassengers, a large proportion of which may be accessing the Internet ata given time. In addition, vessels may rapidly move between satellitebeams. For example, an aircraft may have hundreds of passengers and maytraverse several satellite user beams in the span of a few hours. Thus,the communications system may experience significant variation in demandover time due to the movement of the mobile vessels. While resources ofa given satellite user beam may be flexibly applied to service themobile vessels currently within the satellite user beam, increasingcapacity of a given satellite user beam presents challenges. Increasingbandwidth for wireless communications systems such that excess capacityfor each user beam is available on-demand is expensive and sometimesadditional usable spectrum is unavailable. In addition, where systemresources the resources for increasing the capacity can be taken fromwithout disrupting service currently using the resources.

The described features relate to dynamically allocating satellitecapacity based on mobile vessel network load forecasting. The describedallocation techniques may use predicted locations and predicted networkdemands to predict the spatial network resource demand over a servicearea and one or more service periods. The techniques may then allocatecapacity between different service areas to match the predicted spatialnetwork resource demand during the one or more service periods. Thesetechniques allow for a satellite communications system to better utilizescarce network capacity for providing network service to mobile vessels.

This description provides examples, and is not intended to limit thescope, applicability or configuration of embodiments of the principlesdescribed herein. Rather, the ensuing description will provide thoseskilled in the art with an enabling description for implementingembodiments of the principles described herein. Various changes may bemade in the function and arrangement of elements.

Thus, various embodiments may omit, substitute, or add variousprocedures or components as appropriate. For instance, it should beappreciated that the methods may be performed in an order different thanthat described, and that various steps may be added, omitted orcombined. Also, aspects and elements described with respect to certainembodiments may be combined in various other embodiments. It should alsobe appreciated that the following systems, methods, devices, andsoftware may individually or collectively be components of a largersystem, wherein other procedures may take precedence over or otherwisemodify their application.

FIG. 1 is a simplified diagram of a satellite communications system 100in which the principles included herein may be described. The satellitecommunications system 100 may provide network access service to users180 on-board mobile vessel 130-a. The network access service may beprovided to the users 180 via a multi-user access terminal 170, to whichusers 180 may connect their communication devices 175 via wired (e.g.,Ethernet) or wireless (e.g., WLAN) connections 176. The multi-useraccess terminal 170 may obtain the network access service via a userbeam 145. The satellite communications system 100 is a multiple accesssystem capable of providing network service for multiple mobile vessels130 (e.g., mobile vessel 130-a, 130-n, etc.) and the network users 180of each mobile vessel 130. It should be noted that although mobilevessels 130-a through 130-n are illustrated as aircraft and aircraft areused as examples in the description that follows, references to aircraftmay also be any type of mobile vessel transporting multiple passengerssuch as buses, trains, ships, etc.

The satellite communications system 100 may include any suitable type ofsatellite system, including a geostationary satellite system, mediumearth orbit (MEO), or low earth orbit (LEO) satellite system. Althoughonly a single user beam 145 is illustrated, the satellite 105 may be amulti-beam satellite, transmitting a number (e.g., typically 20-500,etc.) of user beams 145 each directed at a different region of theearth. This can allow coverage of a relatively large geographical areaand frequency re-use within the covered area. Frequency re-use inmulti-beam satellite systems permits an increase in capacity of thesystem for a given system bandwidth. With such a multi-beam satellite,there may be a number of different signal switching configurations,allowing signals from a single gateway system 115 to be switched betweendifferent spot beams. Although illustrated as including one satellite105, the satellite communications system 100 may include multiplesatellites. The multiple satellites may have service coverage areas thatat least partially overlap with each other

The satellite communications system 100 includes a gateway system 115and a network 120, which may be connected together via one or more wiredor wireless links. The gateway system 115 is configured to communicatewith one or more aircraft 130 via satellite 105. The network 120 mayinclude any suitable public or private networks and may be connected toother communications networks (not shown) such as the Internet,telephony networks (e.g., Public Switched Telephone Network (PSTN),etc.), and the like. The network 120 may connect the gateway system 115with other gateway systems, which may also be in communication with thesatellite 105. Alternatively, a separate network linking gateways andother nodes may be employed to cooperatively service user traffic.Gateway system 115 may also be configured to receive return link signalsfrom fixed terminals 185 and aircraft 130 (via the satellite 105) thatare directed to a destination in the network 120 or the othercommunication networks.

The gateway system 115 may be a device or system that provides aninterface between the network 120 and the satellite 105. The gatewaysystem 115 may use an antenna 110 to transmit signals to and receivesignals from the satellite 105 via a gateway uplink 135 and a gatewaydownlink 140. The antenna 110 may be two-way capable and designed withadequate transmit power and receive sensitivity to communicate reliablywith the satellite 105. In one embodiment, satellite 105 is configuredto receive signals from the antenna 110 within a specified frequencyband and specific polarization.

The satellite communications system 100 also includes a network resourcemanager 125, which may be connected together via one or more wired orwireless links to gateway 115 and/or network 120. The network resourcemanager 125 may receive route path data for mobile vessels 130 that arebeing provided network access service by satellite communications system100. For example, the route path data may be received for each ofmultiple aircraft 130, from a centralized database accessible vianetwork 120, etc. The centralized database may include, for example,filed route plan information (e.g., flight paths filed with the FederalAviation Administration (FAA), etc.), and may be supplemented withcurrent status information (e.g., takeoff information, GPS coordinates,flight delays, etc.).

The route path data may include present route information, planned routeinformation, or other path related information associated with themobile vessels 130. For example, planned information can include originand destination locations, and planned travel path, altitude, speed,etc. over the trip. Present information can include present (or lastreported) location, altitude, speed, etc. Other path related informationmay include weather patterns or historical data from similar trips.

In some examples, the network resource manager 125 may predict theroutes for some mobile vessels based on the planned and presentinformation, and the other path related information associated with themobile vessel routes. For example, the network resource manager 125 maypredict the route path data based on origin and destination locationsand data that may impact the route such as weather patterns orhistorical data from other similar trips. Some of these mobile vessels130, and in turn the mobile multi-user terminals 170 within thoseparticular mobile vessels, may not currently be provided network accessservice at the time the network resource manager 125 receives the routepath data. Network resource manager 125 may forecast travel paths forthe aircraft 130 based on the received route path data, and may in turndetermine various service areas and service periods for providing theaircraft 130 network access service. The forecasted travel paths may bebased on current location and route path data for aircraft 130 and maybe recalculated based on changes in current location and/or route pathdata for one or more of the aircraft 130.

Network resource manager 125 may then predict a spatial network resourcedemand based on the predicted network demands for the multi-user accessterminals 170 within a service area during one or more service periods.Based on the predicted spatial network resource demand, the networkresource manager 125 may then determine a satellite capacity resourceconfiguration for satellite user beams from satellite 105 for one ormore service periods. The predicted spatial network resource demand andthe determined satellite capacity resource configuration may be uniqueto each of the service periods.

With the determined satellite capacity resource configuration, thenetwork resource manager 125 may use it to adapt one or morecharacteristics of the satellite user beams 145 for one or more serviceperiods. The adapted characteristics may include beamforming parametersfor at least one satellite user beam, a dwell time for at least onesatellite user beam, a bandwidth for at least one satellite user beam, acoverage area change, or combinations of these characteristics. Inadjusting a bandwidth for at least one satellite user beam, networkresource manager 125 may signal gateway 115 to send a transmission tosatellite 105 via antenna 110 to vary the bandwidth of one or moresatellite user beams based on a change of spatial network resourcedemand. In regards to adjusting dwell times, network resource manager125 may provide an indication to gateway 115 to switch signals tovarious satellite user beams via satellite 105. For adjusting thebeamforming parameters, network resource manager 125 may provide signalsto gateway 115 which are in turn sent to satellite 105 for applicationto signals transmitted and/or received by the satellite 105. Thesesignals may take the form of beamforming coefficients, which paired withbeamforming techniques known in the art, enable satellite 105 to directsatellite user beams in a manner that provides capacity adapted to thepredicted spatial network resource demand. In some examples, dwell timesmay be adjusted by switching between different sets of beamformingparameters.

The ability to shift network resources is sometimes limited, however. Insuch cases, the forecast of the demand pattern can be used to “smooth”the demand peaks by limiting the capacity allocations to users in asystematic way. For example, bulk users can be restricted to minimal (orno) capacity allocation, regular users can be given reduced allocation,and premium users can be spared of all restrictions based on a servicelevel agreement of each class of user. This approach is particularlypertinent to the case of video traffic which can be sent with varyingdata rates (and corresponding varying quality). Expecting a surge indemand, the network can reduce the capacity allocated to a new videoconnection (e.g., for a bulk or regular user), thus saving the capacityfor more users down the line.

Each satellite user beam 145 of the satellite 105 supports the aircraft130 within its coverage area (e.g., providing uplink and downlinkresources). Frequency re-use between satellite user beams 145 may beprovided by assigning one, or more, ranges of frequencies (which may bereferred to as channels) to each satellite user beam 145 and/or by useof orthogonal polarizations. A particular frequency range and/orpolarization may be called a “color,” and frequency re-use in a tiledspot beam satellite system may be according to color. The coverage ofdifferent satellite user beams 145 may be non-overlapping or havevarying measures of overlap. In one embodiment, satellite user beams 145of the satellite 105 may be tiled and partially overlapping to providecomplete or almost complete coverage for a relatively large geographicalarea where partially overlapping or adjacent beams use different rangesof frequencies and/or polarizations (e.g., different colors).

The multi-user access terminal 170 may use an antenna 165 mounted onaircraft 130-a to communicate signals with the satellite 105 via a userbeam downlink 155-a and user beam uplink 160-a. The antenna 165 may bemounted to an elevation and azimuth gimbal which points the antenna 165(e.g., actively tracking) at satellite 105. The satellite communicationssystem 100 may operate in the International Telecommunications Union(ITU) Ku, K, or Ka-bands (for example from 17.7 to 21.2 Giga-Hertz (GHz)in the downlink and 27.5 to 31 GHz in the uplink portion of theKa-band). Alternatively, satellite communications system 100 may operatein other frequency bands such as C-band, X-band, S-band, L-band, and thelike.

In satellite communication system 100, users 180-a to 180-n may utilizethe network access service via mobile devices 175. Each user 180-a to180-n may be provided service via the satellite communication system 100by connecting (e.g., via a wired or wireless connection) a mobile device175 (e.g., desktop computer, laptop, set-top box, smartphone, tablet,Internet-enabled television, and the like) to the multi-user accessterminal 170. As illustrated in FIG. 1, mobile devices 175-a to 175-nare connected via wired or wireless connections 176 (e.g., Wi-Fi,Ethernet, etc.) to multi-user access terminal 170. Multi-user accessterminal 170 may receive data from satellite 105 via user beam downlink155-a and transmit data to satellite 105 via user beam uplink 160-a.Other aircraft within the user beam 145 such as aircraft 130-n mayreceive data from satellite 105 via user beam downlink 155-n andtransmit data to satellite 105 via user beam uplink 160-n. Whilesatellite communication system 100 is illustrated providing mobilenetwork access service to mobile users 180 aboard aircraft 130, it canbe appreciated that the principles described herein for providingnetwork access service to mobile users may be provided using multi-useraccess terminals positioned in fixed locations or on various modes oftransportation where multiple mobile users may desire network access viasatellite communications system 100 (e.g., trains, boats, busses, etc.).

In some embodiments, the predicted network demand includes both apredicted return link (e.g., via user beam uplink 160 and gatewaydownlink 140) utilization of a mobile vessel 130 (e.g., an aircraft) anda predicted forward link (e.g., via gateway uplink 135 and user beamdownlink 155) utilization. In embodiments in which the satellite candynamically allocate capacity among the forward and return links, thepredicted return and forward link utilizations may be used to determinethis dynamic allocation. In other embodiments in which the capacity isnot dynamically allocated among the forward and return links, thepredicted demand may be the predicted forward link utilization of theaircraft, since the forward link data downloaded by passengers (e.g.,content such as videos, web pages, etc.) is typically much greater thanthe return link data uploaded (e.g., requests for content) bypassengers.

Each satellite user beam 145 of the satellite 105 may also support anumber of fixed terminals 185. Fixed terminal 185 may receive data fromsatellite 105 via user beam downlink 155-b and transmit data via userbeam uplink 160-b. Fixed terminal 185 may be any two-way satelliteground station such as a very small aperture terminal (VSAT). Fixedterminal 185 may provide services to subscribers such as data, voice,and video signals. Each fixed terminal may typically provide service toa small number of users (e.g., a residence or business). Networkresource demands from fixed terminals may be predicted relativelyaccurately based on the time of day in the service area that the fixedterminals are located in. For example, network resource demands fromfixed terminals in residential areas may be greater during the eveningthan during the day. Therefore, dynamic allocation of satellite capacitymay be based on the aggregate of a predicted network resource demandfrom fixed terminals and the predicted network resource demand frommobile vessels in a particular service area over a particular time.

FIG. 2 is an example diagram of a service area 200 including thecontinental United States, showing major U.S. cities with large amountsof airline passenger traffic, and major airline route paths. Mobilevessels such as aircraft may be transporting hundreds of passengersduring a flight, and a number of those passengers may be utilizingnetwork services on the aircraft. Due to the large number of passengers,the network resource demands for a particular aircraft may besignificant. Additionally, during an average day in the U.S., there maybe tens of thousands of flights in the air at a particular moment.Coupled with the relatively high rate of speed of the aircraft, thenetwork resource demands within a particular geographic area may varysignificantly over a relatively short period of time as various aircraftenter and leave that particular geographic area. Additionally due to thevast size of the U.S., a geographic area on one end of the country mayexperience surges of network resource demand at different times than ageographic area on the other end of the country due to differing timezones. For example, the Eastern U.S. may experience greater networkdemand earlier in the day while the West Coast of the U.S. mayexperience greater network resource demand during the night on the EastCoast because of late arrivals on the West Coast and red-eye flightscommencing towards the East Coast.

Service area 200 depicts various U.S. cities, including New York City205 and Los Angeles 210. The airline route path 215 between New YorkCity 205 and Los Angeles 210 is one of the busiest air routes in thecontinental U.S. with thousands of passengers flying the route everyday. With flights that originate in New York City 205, the passengersflying to Los Angeles 210 fly over various parts of the countryincluding portions of the East Coast, the Midwest, the Great Plains, theRocky Mountains, and the Southwest. An aircraft flying route path 215requires network access service over different portions of service area200 over different periods of time. Additionally, due to the asymmetryof network resource demand largely due to population and timedifferences, satellite resources may be stressed in certain regions atcertain times of day.

FIG. 3 is an example diagram of a satellite user beam configuration 300of satellite user beams across a geographic area. The geographic areamay have multiple aircraft flying or scheduled to fly through theservice area. Additionally, the geographic area may include fixedterminals. Satellite 105 may provide network coverage to the geographicarea with satellite user beams in accordance with various aspects of thepresent disclosure. The illustrated geographic area may be a regionwithin an overall service area of satellite 105. Satellite 105 may use aparticular system bandwidth and have multiple satellite user beams, suchas satellite user beams 320-a-1, 320-a-2, 320-a-3, and 320-a-4 (shown bytheir associated user beam coverage areas). The satellite user beams320-a may each use portions of the system bandwidth and a polarizationdirection (e.g., allocated by color). The satellite user beams may usefrequency re-use schemes in order to minimize interference and maximizespectral efficiency. The coverage areas for satellite user beams may bedifferent sizes and/or dimensions for various reasons such as satelliteazimuth, frequency, or intentional beam-shaping techniques (e.g., shapedantenna systems, beamforming, etc.). Each satellite user beam 320-a mayservice any combination of fixed terminals and aircraft within its userbeam coverage area.

Satellite 105 may be a part of various types of satellite systems. Forexample, satellite 105 may utilize a fixed beam architecture where thesatellite user beams may each be intentionally fixed on particulargeographic areas. A fixed beam refers to a spot beam for which theangular beamwidth and coverage area does not intentionally vary withtime. Geostationary satellites often use fixed beams. In some examples,user beam coverage areas of adjacent satellite user beams in a fixedbeam system may be partially overlapping to provide continuous coverage,and adjacent satellite user beams 320-a use different ranges offrequencies and/or polarizations (e.g., colors). For example, a fixedbeam system may employ a four-color frequency re-use pattern whereadjacent satellite user beams 320-a use a different beam color. Thesefour colors may be split into two different frequency ranges and twoorthogonal polarizations (e.g., horizontal and vertical, left-handcircularly polarized (LHCP) and right-hand circularly polarized (RHCP),etc.). Adjacent beams using the same or overlapping bandwidth ranges mayhave overlapping coverage areas if their polarizations are orthogonal.Likewise, beams using colors of the same polarization may haveoverlapping beam coverage areas if they do not overlap in frequency.Generally, fixed beam systems use at least four colors (e.g., 4, 5, 6, 7or more colors) to provide contiguous coverage. Alternatively, someadjacent or overlapping satellite user beams 320-a may use the sameresources (the same frequency range and polarization), with interferencemitigated within the overlapping regions using interference mitigationtechniques such as adaptive coding and modulation (ACM), interferencecancellation, space-time coding, and the like.

Alternatively, Satellite 105 may be part of a satellite system that usesa non-fixed beam architecture such as a beamforming architecture. In abeamforming satellite system, signals for each user beam may betransmitted from multiple antenna elements on the satellite, withbeamforming coefficients applied to control the signal phase andamplitude so that the energy transmitted by the antenna elements willconstructively superpose at a desired location. Similarly, beamformingcoefficients may be applied to signals received from satellite terminalsso that energy received from terminals within a particular user beamcoverage area constructively superposes. In some examples, satellite 105may apply beamforming coefficients to signals communicated via thesatellite 105 to control user beam coverage areas (e.g., on-boardbeamforming (OBBF)). Gateway system 115 may send the beamformingcoefficients to the satellite 105 to be applied at the satellite 105. Inother examples, beamforming coefficients may be applied at gateway(s)115 such that the signals transmitted by the satellite will bebeamformed (e.g., ground-based beamforming (GBBF)). In some examples,each satellite user beam in a beamforming system may be partiallyoverlapping with one or more adjacent beams where beams havingoverlapping beam coverage areas use different colors. For example, abeamforming system may utilize a four-color frequency re-use patternwhere adjacent satellite user beams use a different beam color. Thesefour colors may be in a configuration where they are split into twodifferent frequency ranges and two different polarizations. In someexamples, fewer than four or more than four colors may be used. Forexample, some adjacent or overlapping satellite user beams 320-a may usethe same resources (the same frequency range and polarization), withinterference mitigated within the overlapping regions using interferencemitigation techniques such as ACM, interference cancellation, space-timecoding, and the like.

In some examples, satellite 105 may be a part of a beam switchingsatellite system. Satellite 105 may utilize a number of different signalswitching configurations, allowing signals from gateway system 115 to beswitched between different satellite user beams 320-a. This systemallows for particular satellite user beams, that would otherwise overlapin coverage area and frequency with each other, to remain orthogonal intime. In some examples, a satellite user beam in a switching satellitesystem may have a beam coverage area that partially overlaps with thebeam coverage area of one or more adjacent beams, where overlappingbeams that use the same or overlapping frequency ranges are orthogonalto each other in time. Although the switching satellite system mayutilize a frequency re-use pattern using beam colors, beam switchingsatellite systems may use fewer colors than traditional fixed beamsystems. For example, a beam switching satellite system may utilize atwo-color frequency re-use pattern where each color spans a systembandwidth using orthogonal polarizations.

In a certain service period, a particular satellite user beam mayexperience an influx of multiple aircraft into its user beam coveragearea (in addition to any fixed terminals 185 within the user beamcoverage area). As more aircraft enter into a coverage area associatedwith a particular satellite user beam, the network demand for the beammay increase substantially. Each satellite user beam of satellite 105may have an allocated capacity determined by a beam bandwidth and powerbudget so it may be the case that the capacity of the satellite userbeam will be exceeded for some period of time. Additionally it may bedifficult to make adjustments to the satellite user beams frequently oron an immediate basis. For example, there may be an associated overheadin reconfiguring fixed terminals in the service area for differentfrequency ranges and/or polarizations due to any changes in theservicing beam. Thus, it may be advantageous to determine fromforecasted route paths which satellite user beams will encounterincreased or decreased network demand for not only a present serviceperiod, but also for one or more service periods into the future.Various techniques for adapting or providing resources to satellite userbeams which may encounter increased network demand may includebeamforming, reallocating bandwidth, and adjusting dwell time.

FIG. 4A is a contour diagram 400 of predicted spatial network resourcedemand for an example future service period, in accordance with variousaspects of the present disclosure. FIG. 4A may reflect, for example,predicted spatial network resource demand for the aircraft and fixedterminals in the service area of FIG. 3 over a particular serviceperiod. The predicted spatial network resource demand for the fixedterminals may be based on historical network usage (e.g., accounting fortime of day, day of week, etc.). The predicted spatial network resourcedemand for the aircraft may be based from historical network usage databased on origin and/or destination locations, departure and/or arrivaltimes, time of day, day of the week, number of passengers on theaircraft, number of personal electronic devices within the aircraft,aircraft type, network service plans that are offered to passengers,etc. For example, a predicted service demand for each aircraft may beestimated based on a number of passengers on the aircraft or scheduledto be on the aircraft. The predicted service demand for each aircraftmay reflect, for example, an estimated typical information rate based onhistorical usage data for aircraft passengers and the number ofpassengers, or an estimated minimum information rate (minIR), committedinformation rate (CIR), or peak information rate (PIR) based on theservice plan minlR, CIR, or PIR offered to passengers and the number ofpassengers.

The predicted spatial network resource demand may also reflect afiltered (e.g., spatially or temporally) network resource demand over aperiod of time. For example, contour diagram 400 may illustrate averagepredicted network resource demand for a particular service period. Inanother example, contour diagram 400 may illustrate a maximum predictednetwork resource demand (or highest predicted network resource demandlasting longer than a particular time threshold) for a particularservice period. The predicted network resource demand may be determined,in part, from a series of forecasted travel paths of aircraft.

The service periods may be semi-statically or dynamically determined.Contour diagram 400 may reflect the predicted network resource demand ofprimetime hours (e.g., 6-9 pm) on the East Coast. Primetime hours may bethe time frame where predicted network resource demand is at its peak ina given area. Thus contour diagram 400 may illustrate predicted networkresource demand where the demand on the East Coast is at or near itspeak, while demand on the West Coast is below its peak.

The contour lines 405 depict various levels of predicted networkresource demand in a particular region of a service area. In contourdiagram 400, areas within the contour lines 405 defining areas 410-ahave a high level of predicted network resource demand relative to otherareas depicted in contour diagram 400. In contrast, areas 410-d have alow level of predicted network resource demand relative to other areasdepicted in contour diagram 400. Areas 410-b and 410-c may depictintermediate levels of predicted network resource demand. The predictednetwork resource demand in areas 410-a could be influenced by a varietyof factors including the number of fixed terminals in the area and/orone or more forecasted travel paths of aircraft being provided networkaccess service via the satellite system passing through areas 410-awithin the service period. In such examples where predicted networkresource demand may exceed current network resources assigned to anarea, various techniques for apportioning satellite network resourcesmay be employed. These techniques may include reallocating bandwidth,modifying beamforming of user beams, and/or adjusting dwell times forbeam switching.

FIG. 4B is a contour diagram 450 of predicted spatial network resourcedemand for an example future service period, in accordance with variousaspects of the present disclosure. FIG. 4B may reflect, for example,predicted spatial network resource demand for the aircraft and fixedterminals in a service area during primetime hours on the West Coast.

The contour lines 455 depict various levels of predicted networkresource demand in a particular region of a service area. In contourdiagram 450, areas within the contour lines 455 defining areas 460-ahave a high level of predicted network resource demand relative to otherareas depicted in contour diagram 450. In contrast, areas 460-d have alow level of predicted network resource demand relative to other areasdepicted in contour diagram 450. Areas 460-b and 460-c may depictintermediate levels of predicted network resource demand.

Contour diagram 450 is similar in many respects to contour diagram 400.However, predicted network resource demand contour lines 455 aredifferent from contour lines 405 in contour diagram 400 because contourdiagram 450 shows predicted network resource demand during a time period(e.g., primetime hours) on the West Coast. For example, in contourdiagram 450 many people on the East Coast may be reducing their networkusage because their flights have already landed, people are gettingready to sleep or are already asleep, etc. In contrast, on the WestCoast more flights may still be in route during the time period forcontour diagram 450 and many people may still be using network accessservice both in the air and on the ground.

FIGS. 5A and 5B are simplified diagrams illustrating an example ofre-allocating system bandwidth among satellite user beams to dynamicallyallocate satellite network resource capacity based on network loadforecasting, in accordance with various aspects of the presentdisclosure. The techniques of FIGS. 5A and 5B may be employed, forexample, in a fixed satellite beam system in order to dynamicallyallocate satellite network resource capacity based on network loadforecasting.

FIG. 5A depicts a system bandwidth allocation 500-a which, referringback to FIG. 3, may be deployed by satellite 105 for the depictedservice area. System bandwidth 550 of FIG. 4A may be a portion offrequency spectrum in which a satellite 105 may normally operate in(e.g., Ka, Ku, etc.). In one example, each satellite user beam for afixed beam satellite may operate in one of beam colors A, B, C, or D.Although illustrated as different ranges within a system bandwidth 550,beam colors A, B, C, and D may each correspond to a combination offrequency and polarization resources, as described above.

FIG. 5A depicts that beam colors A, B, C, and D are allocated to beamallocations 505-a, 510-a, 515-a, and 520-a, respectively. In thisexample, each beam color occupies a substantially equal portion ofsystem bandwidth 550. Satellite user beams that spatially overlap othersatellite user beams do not share bandwidth resources using resourceallocation 500-a of FIG. 5A.

FIG. 5B depicts an example system bandwidth allocation 500-b where thebeam allocations for beam colors A, B, C, and D have been adapted tobeam allocations 505-b, 510-b, 515-b, and 520-b of system bandwidth 550,respectively. In this example, resource allocations for beam colors A,B, C, and D may have been adjusted from resource allocation 500-a basedon predicted network demand. For example, the spatial network resourcedemand may be predicted for each user beam coverage area of thesatellite user beams of FIG. 3. Using contour diagrams 400 as anexample, network resource manager 125 may have predicted a spatialnetwork resource demand such that in order to best fulfill the networkdemand in area 410-a, satellite 105 may increase the bandwidth resourcesavailable to the satellite user beam(s) servicing area(s) 410-a in orderto increase their throughput, while reducing the bandwidth resourcesavailable to some or all user beams having overlapping user beamcoverage areas. In this case, not all user beams necessarily use thesame set of beam colors. For example, in some areas (e.g., outside ofhigh demand areas), adjacent user beams may use beam allocations 505-a,510-a, 515-a, or 520-a while in other areas adjacent user beams may usebeam allocations 505-b, 510-b, 515-b, or 520-b.

In resource allocation 500-b, the bandwidth resources made available tobeam colors A and D have been increased while the bandwidth resourcesmade available to beam colors B and C have been decreased. It may be thecase that the predicted spatial network resource demand will varybetween each of multiple service periods and that the bandwidthallocation may change for each of the satellite user beams for each ofthe service periods.

As discussed above, re-allocation of the system bandwidth among beamcolors may involve re-configuring one or more fixed terminals 185 ormulti-user access terminals 170 for the adapted system bandwidthallocation. For example, one or more fixed terminals may be switched touse a different bandwidth or polarization direction for the serviceperiod using the adapted system bandwidth allocation. Thisre-configuration may include sending updated configuration parameters tothe one or more fixed terminals 185 or multi-user access terminals 170prior to the service period, with an indication of when the updatedconfiguration parameters are to be used for communications. In someexamples, beam transmission power (e.g., beam equivalent isotropicallyradiated power (EIRP), etc.) may be reallocated in addition to thesystem bandwidth. For example, a multi-beam satellite may have a certainpower budget and some power may be reallocated from user beams having alower predicted demand to user beams predicted to have a greater demandduring a service period. The higher EIRP may increase the signal tonoise ratio (SNR) experienced by terminals (e.g., fixed user terminalsand mobile multi-user terminals), which may be used to increase theeffective data rate to the terminals serviced by the user beam. Asdescribed above, where the limits of shifting capacity usingre-allocation of the system bandwidth and transmission power areexceeded, the predicted spatial network resource demand may be used tosmooth demand peaks by applying restrictions prior to a peak demandbeing reached.

In a beamforming satellite system, apportioning satellite networkresources in response to predicted spatial network resource demand mayinclude modifying beamforming for user beams. FIG. 6 is an examplediagram 600 of modified beamforming of satellite user beams todynamically allocate satellite network resource capacity based onnetwork load forecasting, in accordance with various aspects of thepresent disclosure. Diagram 600 may illustrate, for example, adjustingof beamformed user beams for the same service area shown in diagram 300of FIG. 3 based on network load forecasting. In this example, satelliteuser beams 320-b-1, 320-b-2, 320-b-3, and 320-b-4 (illustrated by theirassociated user beam coverage areas) have been adjusted relative tosatellite user beams 320-a-1, 320-a-2, 320-a-3, and 320-a-4,respectively, illustrated in FIG. 3 based on predicted network demand.

Diagram 600 may depict satellite user beams that have been adjusted viabeamforming in order to tailor the network resources of satellite 105toward areas exhibiting increased predicted spatial network resourcedemand relative to the service period shown in FIG. 3. Satellite userbeam 320-b-4 may represent a satellite user beam having a coverage areain the Eastern time zone, satellite user beam 320-b-3 may represent asatellite user beam having a coverage area in the Central time zone,satellite user beam 320-b-2 may represent a satellite user beam having acoverage area in the Mountain time zone, and satellite user beam 320-b-1may represent a satellite user beam having a coverage area in thePacific time zone.

Diagram 600 may depict the U.S. during primetime hours on the West Coastwhereas FIG. 3 may depict the U.S. during primetime hours on the EastCoast. As explained above, the West Coast may experience increasednetwork access demand at different times than the East Coast.Contrasting with FIG. 3, satellite user beams 320-b in diagram 600 aremore tightly concentrated on areas on the West Coast than were satelliteuser beams 320-a in FIG. 3. Because satellite user beams 320-b-4 and320-b-3 have coverage areas in portions of the U.S. that have a laterlocal time (e.g., past primetime hours), they may experience lowernetwork access demand relative to time zones west of them. Consequently,satellite user beams 320-b-4 and 320-b-3 may be beamformed such thattheir coverage areas are increased relative to satellite user beams320-a-4 and 320-a-3, respectively. Also, because satellite user beams320-b-2 and 320-b-1 have coverage areas in portions of the U.S. that arein primetime hours for the time period in which the beamforming shown inFIG. 6 is deployed, they may experience relatively higher network accessdemand. Consequently, satellite user beams 320-b-2 and 320-b-1 may bebeamformed such that their coverage areas are decreased relative tosatellite user beams 320-a-2 and 320-a-1, respectively. In addition tochanging relative sizes of satellite user beams, various satellite userbeams may be shifted to different geographic areas to reflect increasingand decreasing network demands. Additionally or alternatively, more orfewer beams may be formed in various areas. For example, additionalbeams may be added via beamforming in areas of higher predicted spatialnetwork resource demand.

Network resource manager 125 may determine a satellite capacity resourceconfiguration for the satellite user beams over one or more serviceperiods based on the predicted spatial network resource demand for theservice area. This satellite capacity resource configuration may be aseries of parameters which are sent to satellite 105 for application tosignals transmitted and/or received by the satellite 105. These signalsmay instruct satellite 105 on how to adapt satellite user beams tobetter provide network coverage to the aircraft 130 along theirforecasted travel paths. These signals may take the form of beamformingcoefficients, which paired with beamforming techniques known in the art,enable satellite 105 to direct satellite user beams in a manner thatprovides capacity adapted to the predicted spatial network resourcedemand. Additionally or alternatively, beamforming coefficients may beapplied at a gateway system 115 such that the signals transmitted by thesatellite will be beamformed.

As with re-allocation of system bandwidth, some fixed terminals and/ormulti-user access terminals 170 may be switched from service via oneuser beam to another user beam when the user beam coverage areas forbeamformed user beams are adjusted. Thus, adapting a satellite capacityresource configuration by modifying beamforming coefficients may includere-configuring one or more fixed terminals 185 or multi-user accessterminals 170 for the adapted beamformed user beams. For example, one ormore fixed terminals may be switched to use a different bandwidth orpolarization direction for the service period. This re-configuration mayinclude sending updated configuration parameters to the one or morefixed terminals 185 or multi-user access terminals 170 prior to theservice period, with an indication of when the updated configurationparameters are to be used for communications. In some examples,adjusting beamforming may also require adjusting the satellite pathways.For example, coupling between user beam signal pathways and beamformers,or between beamformers and antenna elements may be adjusted to providedifferent combinations of satellite pathways from user beam signalpathways to antenna elements. As described above, where the limits ofshifting capacity using beamforming are exceeded, the predicted spatialnetwork resource demand may be used to smooth demand peaks by applyingrestrictions prior to a peak demand being reached.

For a satellite system employing beam switching, apportioning satellitenetwork resources in response to predicted spatial network resourcedemand may include adapting dwell times for beam switching. FIG. 7 is asimplified timing diagram 700 illustrating an example of adapting dwelltimes to dynamically allocate satellite network resource capacity basedon network load forecasting, in accordance with various aspects of thepresent disclosure. Timing diagram 700 may be associated with the use ofa multi-beam satellite system employing beam switching of user beams.FIG. 7 depicts a frame 705-a having dwell times t_(A1), t_(B1), t_(C1),and t_(D1) and frame 705-b having dwell times t_(A2), t_(B2), t_(C2),and t_(D2). A service period may correspond to a number of contiguousframes. Although the dwell times depicted in frame 705-a are contiguous,they may also not be contiguous.

During frame 705-a, gateway system 115 may continuously transmit asignal to a satellite 105 over a first frequency band having a givenbandwidth. The satellite may be a switching bent pipe satellite that mayupconvert or downconvert the signal to a second, different frequencyband of the same bandwidth for relay to terminals in user beams. Thensatellite 105 may switch the signal to various satellite user beams,each satellite user beam using all of the given bandwidth during itsassigned dwell time. For example, the satellite may switch the signal toa first satellite user beam during dwell time t_(A1). After dwell timet_(A1), the signal may be switched to a second satellite user beam,which then occupies the bandwidth during dwell time period t_(B1). Thesignal may also then be switched to a third and a fourth satellite userbeam during dwell time periods t_(C1), and t_(D1), respectively.

Between frame 705-a and 705-b, network resource manager 125 may havepredicted a spatial network resource demand for a future service periodin which more capacity resources are desired for the third and fourthsatellite user beams. In order to improve capacity allocation across theservice area, the dwell times for each of the satellite user beams areadjusted for the service period. Frame 705-b shows the adjusted dwelltimes for a frame of the service period, with increased time resourcesfor dwell times t_(C2), and t_(D2) relative to t_(C1), and t_(D1), anddecreased time resources for dwell times t_(A2), and t_(B2) relative totai, and t_(B1) of frame 705-a. Although discussed with reference toforward link communications from the gateway(s) 115 to the terminals viathe satellite 105, beam switching and adaptation of dwell times based onforecasted network load may also be used for return link communications.As described above, where the limits of shifting capacity by adjustingdwell times for user beams are exceeded, the predicted spatial networkresource demand may be used to smooth demand peaks by applyingrestrictions prior to a peak demand being reached.

FIG. 8 is a block diagram illustrating an example of a gateway 115-a fordynamically allocating satellite network resource capacity based onnetwork load forecasting, in accordance with various aspects of thepresent disclosure. The gateway 115-a may be an example of the gateway115 described with reference to FIG. 1. The gateway 115-a may include amodem 810, communications interface 820, network resource manager 125-a,processor 830, memory 840, software code 845, and bus 850. Networkresource manager 125-a may also be a separate entity (e.g., core node)of satellite communications system 100.

Modem 810 manages communications between the gateway 115-a and satellite105 via ground station antenna system 110-a. Modem 810 may be configuredto communicate with satellite 105 over one or more frequency bands(e.g., Ka, Ku, etc.) and may be configured to automatically orientantenna 110-a to transmit signals to and receive signals from satellite105.

Communications interface module 820 controls network traffic to and fromnetwork 120-a. Communications interface 820 may implement wired networkinterfaces (e.g., Ethernet, Fibre Channel, etc.) and/or wireless networkinterfaces (e.g., IEEE 802.11 compliant interfaces, etc.).

Processor 830 may include an intelligent hardware device, e.g., acentral processing unit (CPU), a microcontroller, an ASIC, etc.Processor 830 may process information received through modem 810 orcommunications interface 820, or information to be sent tocommunications interface 820 or modem 810 for transmission. Processor830 may handle, alone or in connection with gateway 115-a, variousaspects of allocating satellite capacity based on aircraft loadforecasting.

Memory 840 may include random access memory (RAM) or read-only memory(ROM). Memory 840 may store computer-readable, computer-executable code845 containing instructions that are configured to, when executed, causeprocessor 830 to perform various functions described herein.Alternatively, the code 845 may not be directly executable by processor830 but be configured to cause the gateway 115-a (e.g., when compiledand executed) to perform various of the functions described herein.

Network resource manager 125-a may, in conjunction with memory 840 andprocessor 830, perform the functions described above includingallocating satellite capacity based on aircraft network loadforecasting. For example, network resource manager 125-a may predictspatial network resource demand for a service area over one or moreservice periods based on forecasted travel paths and predicted servicedemands for a plurality of mobile multi-user terminals, determine asatellite capacity resource configuration for a plurality of satelliteuser beams for the one or more service periods based on the predictedspatial network resource demand, and adapt characteristics of theplurality of satellite user beams for the one or more service periodsbased on the determined satellite capacity resource configuration.

The components of the gateway 115-a may, individually or collectively,be implemented with one or more application-specific integrated circuits(ASICs) adapted to perform some or all of the applicable functions inhardware. Alternatively, the functions may be performed by one or moreother processing units (or cores), on one or more integrated circuits.In other embodiments, other types of integrated circuits may be used(e.g., Structured/Platform ASICs, Field Programmable Gate Arrays(FPGAs), and other Semi-Custom ICs), which may be programmed in anymanner known in the art. The functions of each unit may also beimplemented, in whole or in part, with instructions embodied in amemory, formatted to be executed by one or more general orapplication-specific processors.

FIG. 9 is a block diagram illustrating an example of a network resourcemanager 125-b for dynamically allocating satellite network resourcecapacity based on network load forecasting, in accordance with variousaspects of the present disclosure. Network resource manager 125-b may bean example of the network resource managers 125 described with referenceto FIGS. 1 and 8. For example, network resource manager 125-b may be anexample of network resource manager 125-a of FIG. 8 which may be in aseparate entity (e.g., core node) of satellite communications system 100of FIG. 1. Network resource manager 125-b may include network interface910, service demand manager 920, travel path forecaster 930, networkutilization database 940, spatial network resource demand analyzer 950,satellite configuration manager 960, and shared link interface 970. Eachof these components may be communicatively coupled to each other.

Network interface 910 may receive route path data. Network interface 910may forward this data to travel path forecaster 930. Travel pathforecaster 930 may use the data to construct forecasted travel paths foraircraft for which it has route path data. Network interface 910 mayalso receive data regarding the number of passengers on aircraft or thenumber of passengers ticketed to travel on the aircraft and forward thisdata to service demand manager 920. Service demand manager 920 maydetermine predicted service demand for the aircraft for future serviceperiods. The predicted service demand may be determined based onhistorical usage patterns (e.g., taking into account time of day),number of passengers on the aircraft or scheduled to be on the aircraft,and/or data rates (e.g., minlR, CIR, PIR) of service plans offered topassengers.

Spatial network resource demand analyzer 950 may use the forecastedtravel paths to forecast spatial network resource demand for one or morefuture service periods using additional information such as currentservice demand by one or more mobile multi-user terminals, currentservice demand of fixed terminals with a service area, respectivenumbers of active users for the one or more mobile multi-user terminals,etc. For example, the predicted service demand for a future time periodfor an aircraft determined by the service demand manager 920 may becombined with the forecasted travel path to determine the predictedspatial service demand for the aircraft. The predicted spatial servicedemands for multiple aircraft may be summed and combined with predictedspatial service demand of fixed terminals to determine a predictedspatial network resource demand for a given service area. The predictedspatial network resource demand may include predicted demand for anumber of time intervals within the future time period. For example,spatial network resource demand may be predicted for each of multipletime intervals (e.g., 5, 10, 20, 30 or 60 minute intervals, etc.).

Spatial network resource demand analyzer 950 may receive historical datasuch as the historical service demand of aircraft in a service area orservice period, the historical network of fixed terminals within aservice area or service period, the historical network utilization forservice periods similar to those of the future service periods, etc.,from network utilization database 940. With the received data, spatialnetwork resource demand analyzer 950 may then predict a spatial networkresource demand for a service area over one or more service periods.

Satellite configuration manager 960 may receive the predicted spatialnetwork resource demand and determine a satellite capacity resourceconfiguration for a plurality of satellite user beams for one or moreservice periods based on the predicted demand. The predicted spatialnetwork resource demand may be unique to each of the plurality ofservice periods. Based on the determined configuration, satelliteconfiguration manager 960 may adapt characteristics of satellite userbeams for one or more service periods. These characteristics may includeadapting at least one beamforming parameter for at least one satelliteuser beam, a dwell time for at least one satellite user beam, abandwidth for at least one satellite user beam, a coverage area change,or combinations thereof. Shared link interface 970 may then forward thedata to the gateway system 115. This data may be in the form ofbeamforming coefficients which may be applied at gateway system 115 orsatellite 105, dwell time adjustments, or bandwidth adjustments.

FIG. 10 is a flowchart diagram of an example method 1000 for dynamicallyallocating satellite network resource capacity based on network loadforecasting, in accordance with various aspects of the presentdisclosure. The method 1000 may be performed, for example, by thenetwork resource manager 125 of FIGS. 1, 8, and 9. The method 1000 maybe employed in a multi-beam satellite system in which multiple userbeams from a satellite 105 at least partially overlap each other. Insome examples, the multi-beam satellite system includes multiplesatellites 105.

At block 1005 of method 1000, network resource manager 125 receivesroute path data for one or more aircraft provided network access servicevia the multi-beam satellite system and forecasts travel paths for theone or more aircraft. The forecasted travel paths may be based oncurrent route path data or recalculated based on a change in route pathdata for the one or more aircraft. Network resource manager 125 mayreceive this route path data via network 120 or it may receive the datafrom the aircraft 130 (e.g., via satellite 105).

Network resource manager 125 determines the spatial network resourcedemand for a service period based on the route path data and predictedservice demands the aircraft at block 1010. One or more of the aircraftmay not currently be provided network access service at the time thenetwork resource demand is predicted. The respective predicted networkservice demand for the mobile multi-user terminals on the aircraft mayvary based on the time of day. For example, there may be higher networkdemands during the middle of the day versus at night when some users ofthe mobile terminals may be asleep. Network resource manager 125 mayattribute a value used in part to determine the predicted networkservice demand for the multi-user terminals based on the time of day themulti-user terminals are being utilized. Network resource manager 125may determine the spatial network resource demand for multiple periodictime intervals (e.g., 5, 10, 20, 30 or 60 minute intervals, etc.), andmay determine the service period by aggregating time intervals having asimilar spatial network resource demand.

The predicted network resource demand may be based on a number offactors including the current service demand of the mobile multi-userterminals, the historical service demand of the mobile multi-userterminals, the current service demand of fixed terminals within aservice area, the historical service demand of the fixed terminals, thetime of day of the one or more service periods, the historical networkutilization for service periods similar to those of the one or moreservice periods, the respective numbers of active users for the mobilemulti-user terminals, the respective numbers of predicted users for themobile multi-user terminals, a network service plan that is offered tousers of the mobile multi-user terminals, or a combination thereof.

At block 1015, the network resource manager 125 determines a satellitecapacity resource configuration for the multi-beam satellite system thatprovides network access service to the one or more aircraft. Thesatellite capacity resource configuration may affect a number ofcharacteristics of how the multi-beam satellite system operatesincluding what beam mode it chooses to operate, the frequencies, power,polarization, and direction of the beams, etc. The network resourcemanager 125 may determine separate satellite capacity resourceconfigurations for each of multiple service periods.

At block 1020, the network resource manager 125 may monitor for changesthat would affect predicted network resource demand and revise thepredicted network resource demand. For example, changes in networkconditions such as changes in actual demand relative to predicted demandmay occur from a large number of users disconnecting/connecting fromnetwork use from the time the prediction occurred, different networkapplications being utilized (e.g., high data intensive applications suchas streaming video), etc. In addition, changes to route paths (e.g.,flight delays, etc.) may trigger updating of predicted network resourcedemand for affected service periods. Additionally or alternatively,actual spatial network resource demand for one service period beingdifferent than the predicted network resource demand for that serviceperiod may trigger updates to the predicted network resource demand forsubsequent service periods. Because adapting characteristics of thesatellite system may require large amounts of resource overhead toenact, the various triggers for revising the predicted network resourcedemand determined at block 1010 or revising the satellite capacityresource configuration determined at block 1015 may be based on changesto network conditions or updated spatial network resource demand for aservice period exceeding a threshold. For example, an initial spatialnetwork resource demand for a future service period may be predicted atblock 1010 and a satellite capacity resource configuration for adaptinga communication system to the spatial network resource demand may bedetermined at block 1015. Subsequently, the spatial network resourcedemand for the future service period may be updated via identifying atrigger such as a change to route path data at block 1020. The updatedspatial network resource demand may be compared with the initial spatialnetwork resource demand, and the satellite capacity resourceconfiguration may be updated only if the updated spatial networkresource demand exceeds (e.g., for one or more user beams) the initialspatial network resource demand by more than a predetermined threshold.In some examples, the spatial network resource demand for one or morefuture service periods are continually updated (e.g., at periodicintervals that are shorter than the service periods) based on up-to-dateroute path data, actual network conditions, and the like. For example,spatial network resource demand may be predicted for a first serviceperiod and a second service period, where the first service periodprecedes the second service period in time. At or during the firstservice period, a difference between an actual spatial network resourcedemand and the predicted spatial network resource demand for the firstservice period may be determined. The difference may be compared to athreshold. For example, the difference between an average or peak of theactual spatial network resource demand for the first service period fora given user beam or region and the predicted spatial network resourcedemand may be compared to a threshold (e.g., a beam demand threshold orregional demand threshold, etc.). In response to determining that thedifference exceeds the threshold, the predicted spatial network resourcedemand for the second service period may be revised. The revisedpredicted spatial network resource demand for the second service periodmay take into account the actual spatial network resource demand of thefirst service period.

If, at block 1020, the start time of the service period is reached andno revisions to the predicted spatial network resource demand orsatellite capacity resource configuration are identified, the networkresource manager 125 proceeds to block 1025 to implement the satellitecapacity resource configuration determined in block 1015 for the serviceperiod.

Based on the satellite capacity resource configuration determined inblock 1015, the network resource manager 125 adjusts at least onecharacteristic for the multi-beam satellite system at block 1025. Thenetwork resource manager 125 may, for example, transmit a signal to thegateway 115 and/or satellite 105 to adjust at least one characteristicof satellite user beams transmitted by the satellite. Additionally oralternatively, at least one characteristic associated with return linktransmissions from terminals (e.g., fixed terminals and/or mobilemulti-user terminals aboard aircraft) may be adjusted. A variety ofcharacteristics of the multi-beam satellite system may be adaptedincluding changing at least one beamforming parameter for at least onesatellite user beam, a dwell time for at least one satellite user beam,a bandwidth for at least one satellite user beam, a coverage areachange, or combinations thereof. Additionally, adapting characteristicsof the multi-beam satellite system may include re-configuring parametersfor at least one fixed terminal or mobile multi-user terminal. Withcharacteristics of the multi-beam satellite system configured for theservice period, method 1000 may end at block 1030. Method 1000 mayreturn to block 1005 upon detection of a trigger condition (e.g.,changes to route paths, change in actual spatial network resourcedemand, etc.)

It should be noted that these methods describe possible implementation,and that the operations and the steps may be rearranged or otherwisemodified such that other implementations are possible. In some examples,aspects from two or more of the methods may be combined. For example,aspects of each of the methods may include steps or aspects of the othermethods, or other steps or techniques described herein. Thus, aspects ofthe disclosure may provide for consumer preference and maintenanceinterface.

The description herein is provided to enable a person skilled in the artto make or use the disclosure. Various modifications to the disclosurewill be readily apparent to those skilled in the art, and the genericprinciples defined herein may be applied to other variations withoutdeparting from the scope of the disclosure. Thus, the disclosure is notto be limited to the examples and designs described herein but is to beaccorded the broadest scope consistent with the principles and novelfeatures disclosed herein.

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein can be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations. Also, as used herein, including in the claims, “or” as usedin a list of items (for example, a list of items prefaced by a phrasesuch as “at least one of” or “one or more”) indicates an inclusive listsuch that, for example, a list of at least one of A, B, or C means A orB or C or AB or AC or BC or ABC (i.e., A and B and C).

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that can beaccessed by a general purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media cancomprise RAM, ROM, electrically erasable programmable read only memory(EEPROM), compact disk (CD) ROM or other optical disk storage, magneticdisk storage or other magnetic storage devices, or any othernon-transitory medium that can be used to carry or store desired programcode means in the form of instructions or data structures and that canbe accessed by a general-purpose or special-purpose computer, or ageneral-purpose or special-purpose processor. Also, any connection isproperly termed a computer-readable medium. For example, if the softwareis transmitted from a website, server, or other remote source using acoaxial cable, fiber optic cable, twisted pair, digital subscriber line(DSL), or wireless technologies such as infrared, radio, and microwave,then the coaxial cable, fiber optic cable, twisted pair, DSL, orwireless technologies such as infrared, radio, and microwave areincluded in the definition of medium. Disk and disc, as used herein,include CD, laser disc, optical disc, digital versatile disc (DVD),floppy disk and Blu-ray disc where disks usually reproduce datamagnetically, while discs reproduce data optically with lasers.Combinations of the above are also included within the scope ofcomputer-readable media.

The various illustrative blocks and modules described in connection withthe disclosure herein may be implemented or performed with ageneral-purpose processor, a digital signal processor (DSP), an ASIC, anfield programmable gate array (FPGA) or other programmable logic device,discrete gate or transistor logic, discrete hardware components, or anycombination thereof designed to perform the functions described herein.A general-purpose processor may be a microprocessor, but in thealternative, the processor may be any conventional processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices (e.g., a combinationof a DSP and a microprocessor, multiple microprocessors, one or moremicroprocessors in conjunction with a DSP core, or any other suchconfiguration). The functions of each unit may also be implemented, inwhole or in part, with instructions embodied in a memory, formatted tobe executed by one or more general or application-specific processors.

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label.

What is claimed is:
 1. A method for allocating satellite capacity in amulti-beam satellite system, comprising: providing network accessservice over a service area via a plurality of beamformed satellite userbeams; predicting spatial network resource demand for the service areaover one or more service periods based at least in part on a currentservice demand of a plurality of mobile multi-user terminals;determining a satellite capacity resource configuration for theplurality of beamformed satellite user beams for the one or more serviceperiods based on the predicted spatial network resource demand; andadapting at least one beamforming characteristic of at least one of theplurality of beamformed satellite user beams for the one or more serviceperiods based on the determined satellite capacity resourceconfiguration.
 2. The method of claim 1, wherein the at least oneadapted beamforming characteristic comprises one or more beamformingcoefficients for the at least one of the plurality of beamformedsatellite user beams.
 3. The method of claim 1, wherein the adaptingcomprises: transmitting the at least one or more beamformingcharacteristic to a satellite to be applied at the satellite for the oneor more service periods.
 4. The method of claim 1, wherein the adaptingcomprises: transmitting the at least one or more beamformingcharacteristic to one or more gateways of the multi-beam satellitesystem to be applied at the one or more gateways for the one or moreservice periods.
 5. The method of claim 1, wherein the satellitecapacity resource configuration for the one or more service periodscomprises one or more additional beamformed satellite user beams for theservice area.
 6. The method of claim 1, wherein the satellite capacityresource configuration for the one or more service periods compriseschanging a geographic coverage area for the at least one of theplurality of beamformed satellite user beams.
 7. The method of claim 1,wherein the predicted spatial network resource demand is based at leastin part on one or more network service plans that are offered to usersof the plurality of mobile multi-user terminals, data rates of the oneor more network service plans that are offered to the users of theplurality of mobile multi-user terminals, or a combination thereof. 8.The method of claim 1, further comprising: transmitting one or moreconfiguration parameters to one or more of the plurality of mobilemulti-user terminals prior to the one or more service periods based atleast in part on the determined satellite capacity resourceconfiguration.
 9. The method of claim 8, further comprising:transmitting with the one or more configuration parameters, anindication of when the one or more configuration parameters are to beused for communications.
 10. The method of claim 1, wherein the one ormore service periods comprises a plurality of service periods, andwherein the predicted spatial network resource demand and the determinedsatellite capacity resource configuration are unique to each of theplurality of service periods.
 11. The method of claim 1, wherein thespatial network resource demand is predicted for each user beam coveragearea of the plurality of beamformed satellite user beams.
 12. The methodof claim 1, wherein the multi-beam satellite system comprises multiplesatellites with service coverage areas that at least partially overlapwith each other.
 13. A network resource manager for allocating satellitecapacity in a multi-beam satellite system providing network accessservice over a service area via a plurality of beamformed satellite userbeams, comprising: a processor; memory in electronic communication withthe processor; and instructions stored in the memory; wherein theinstructions are executable by the processor to: predict spatial networkresource demand for the service area over one or more service periodsbased at least in part on a current service demand of a plurality ofmobile multi-user terminals; determine a satellite capacity resourceconfiguration for the plurality of beamformed satellite user beams forthe one or more service periods based on the predicted spatial networkresource demand; and adapt at least one beamforming characteristic of atleast one of the plurality of beamformed satellite user beams for theone or more service periods based on the determined satellite capacityresource configuration.
 14. The network resource manager of claim 13,wherein the at least one adapted beamforming characteristic comprisesone or more beamforming coefficients for the at least one of theplurality of beamformed satellite user beams.
 15. The network resourcemanager of claim 13, wherein the instructions executable to cause theapparatus to adapt the at least one beamforming characteristic compriseinstructions to cause the apparatus to: transmit the at least one ormore beamforming characteristic to a satellite to be applied at thesatellite for the one or more service periods.
 16. The network resourcemanager of claim 13, wherein the instructions executable to cause theprocessor to adapt the at least one beamforming characteristic compriseinstructions to cause the processor to: transmit the at least one ormore beamforming characteristic to one or more gateways of themulti-beam satellite system to be applied at the one or more gatewaysfor the one or more service periods.
 17. The network resource manager ofclaim 13, wherein the satellite capacity resource configuration for theone or more service periods comprises one or more additional beamformedsatellite user beams for the service area.
 18. The network resourcemanager of claim 13, wherein the satellite capacity resourceconfiguration for the one or more service periods comprises changing ageographic coverage area for the at least one of the plurality ofbeamformed satellite user beams.
 19. The network resource manager ofclaim 13, wherein the predicted spatial network resource demand is basedat least in part on one or more network service plans that are offeredto users of the plurality of mobile multi-user terminals, data rates ofthe one or more network service plans that are offered to the users ofthe plurality of mobile multi-user terminals, or a combination thereof.20. The network resource manager of claim 13, wherein the instructionsare executable to cause the processor to: transmit one or moreconfiguration parameters to one or more of the plurality of mobilemulti-user terminals prior to the one or more service periods based atleast in part on the determined satellite capacity resourceconfiguration.
 21. The network resource manager of claim 20, wherein theinstructions are executable to cause the processor to: transmit with theone or more configuration parameters, an indication of when the one ormore configuration parameters are to be used for communications.
 22. Thenetwork resource manager of claim 13, wherein the one or more serviceperiods comprises a plurality of service periods, and wherein thepredicted spatial network resource demand and the determined satellitecapacity resource configuration are unique to each of the plurality ofservice periods.
 23. The network resource manager of claim 13, whereinthe spatial network resource demand is predicted for each user beamcoverage area of the plurality of beamformed satellite user beams. 24.The network resource manager of claim 13, wherein the multi-beamsatellite system comprises multiple satellites with service coverageareas that at least partially overlap with each other.